Error with cfrontsql.dll

Hi everyone,

I have an external application that connects with SQL DB through CFRONT dll's. The application works fine with NAV 5.0 sql database and cfront's files with 5.0.26084.0 version. But if i try the same with NAV 2009 R2 SQL database and cfront's files with 6.0.32465.0 version I get the error bellow:

This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem

Any suggestion??

Thanks for advance.